Hi Novak, The errors do not seem to be associated with any particular file - they occur randomly during a folder copy/paste from another machine on my LAN. I have not seen the error copying huge files (like a folder full of 3-4 gig iso files), but it happens regularly on groups of small to medium files. I have not seen the error when copying a single file. I have not seen the error copying a folder full of medium size files between different partitions on the Win7 machine. It occurs ONLY between the Win7 machine and other machines on the LAN, which is why I posted the issue on the Network section of the forum. The Windows 7 machine will not allow me to start the VSS (Volume Shadow Copy) service -- "access denied" Heck, I'm the admin, so what's up with that? Thanks you for your reply. Ken.C